SECTION 518-4 1 1 - 1 00
J1
J2
J3
J4
JS
JS
J7
J8
JS
J10
J 1 1
J12
J13
J14
J15
J16
J17
J18
J19A
J21A
J23A
J25A
A
A A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
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It)
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N
N
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N
....
CD
co
t-
t-
t-
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
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"'
....
co
N
CD
0
....
co
N
CD
0
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It)
,..._
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�
N
N
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It)
It)
It)
""
""
""
""
""
w
w
w
w
CD
,..._
""
""
""
""
""
""
""
""
""
""
""
""
""
z
z
z
z
co
co
co
co
co
t-
t-
t-
t-
t-
t-
t-
t-
t-
t-
t-
....
....
....
....
"'
"'
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484A KTU
- 488A KTU-
J1
J2
J3
J4
JS
JS
J258
8
8
8
8 8
8 8 8 8 8 8 8 8 8 B B B B
484A KTU-STA TION CIRCUIT
485A KTU-CONTROLLER CIRCUIT
48SA KTU-SERVICE CIRCUIT
487A KTU-BATTERY FEEO CIRCUIT
A. 572A1 KSU-FRONT VIEW
20SA
POWER
UNIT
488A KTU-LINE INTERFACE CIRCUIT
489A KTU-TOUCH-TONE OECOOER
CIRCUIT
KS-21651 , l4-FUSE BOARO
J27
....
CD
"'
TERI'IINAL
PAGING
ACCESS
STATIONS
SWITCH
SWITCH
206A
POWER
UNIT
POWER
CONNECTOR
B. 572A1 KSU-REAR VIEW
Fig. !-Layout of 572A I KSU
restored will be out of service until they go
on-hook momentarily.
B.
485A KTU-Controller Circuit
2 . 1 5
The controller circuit processes the calls
and features through the system. Contained
on the board are the central processing unit,
Page 6
memory, timing circuits, and the
-lOY
voltage
regulator. The 485A KTU is installed in J2.
C. 486A KTU-System Service Circuit
2 . 1 6
The service circuit performs the following
functions.
BSP 518-411-100-i01 1978-08-06.jpg Scanned by Frank Harrell, Cowboy Frank) Castle Rock, Colorado Oct 15, 2012 20:56:31